Scales



(No Model.)

W. H. STEWART.

WEIGHING SCALES.

lPatented July 23, 1889. lf3-yl i I I /r-narJ,

Kaff

UNITED STATES PATENT OFFICE.

TILLIAM H. STE\VART, OF KANSAS CITY, KANSAS, ASSIGNOR OF ONE-HALF TO VILLIAM S. VHITTAKER, OF SAME PLACE.

WElGHlNG-SCALES.

SPECIFICATION forming part of Letters Patent No. 407,74*?, dated July 23, 1889.

Application filed November l5, 1888. Serial No. 290,971. (No model.)

T0 all 10700771/ il? may 007w67^71fr Upon the beam A are arranged two sets of Be it known that I, WILLIAM II. STEWART, poises disposed, respectively, on opposite a citizen of the United States, residing in Kansides of the fulcrum and consisting each ot` sas City, county of Vyandotte, and State of two poises c e. One set of poises is applied 55 5 Kansas, have invented a series of useful Imto each scale and they normally occupy the provements in Veighing-Scales, of which the spaces a a at the initial ends of said scales, following is a clear and exact description, being wholly disposed in said spaces. Thus reference being had to the accompanying one set is arranged in the space at ornear one drawings, forming part of this specification. end of the beam, while the other set is ar- 6o 1o This invention relates to certain improveranged in the space at or near the other side ments in weighing-scales, having for its obof the fulcrum, or one each may be shifted ject to provide for balancing the beam withto each end space and to each space upon the out the use of counterpoises, to remedy slight opposite side of the ulcrum. variations that may exist between sets of The scale-beam A passes at its center 65 15 weighing-poises, and to increase or augment through a fulcrum-sleeve A', (which is prothe weighing capacity of the scale; and to vided with a longitudinal bore to receive it,) these ends the invention consists in a novel said sleeve being provided on its opposite construction and combination of devices, fully sides with lateral pivots or fulcrums f, which e described hereinafter in connection with the rest upon the fulcruin support or post bx, se- 7o 2o drawings, and specifically pointed out in the cured upon a suitable bracket or support, as

claims. shown.

In the drawings, Figure l is a side view of The sleeve is provided with a binding or a scale embodying my invention. Fig. 2 is a set screw l6,which passes through a threaded side view of the beam detached. Fig. 3 is a aperture and impinges against the scale-beam 75 2 5 detail view of the beam, (partly broken away,) t-o hold it stationaryin the sleeve, and a slide the fulcrum-sleeve and the slide detached. A2, which lits on the sleeve, is also engaged Fig. 4 is a detail perspective view of the auxand held in position by the said set-screw. iliary beam with its equipments arranged to This slide is provided with an opening which enable it to be used independently of the is equal in size to the exterior of the vsleeve 8o 3o main scale-beam, and Fig. 5 is a similar view and fits snugly thereon, and it is also provided of the auxiliary beam with its members dewith lateral scale-platform pivots f', through t-ached. which and the usual hooks fL connection is In the construction of my improved scales effected between the scale-beam and the rod I employ a main scale-beam A, having its ful- A4 of the scale-platform. (Not shown.) 8 5 c 5 crum at an intermediate point and provided The auxiliary scale-beam E, which is prefwith arms a2 a2, which are inscribed with inerably arranged beneath that arm of the main dependent scales or series of graduations. beam having the outwardly-reading scale, is These scales read, respectively, from the outer provided with a loose iulcrum-sleeve d, havend of one arm inward (toward the fulcrum) ing lateral pivots d', carrying a link D,which 9o 4o and from the inner end of the other arm outis looped or otherwise connected to the exward, (from the fulcrurn.) Central open or tremity of said arm of the scale-bea1nA,which blank spaces a a are arranged between the extends thereover. A slide d2 iits on the central point aX of the scale-beam and the sleeve d, and is provided with lateral pivots adjacent ends of the scales, and similar blank d3, which rest in a bearing in the fulcrum- 95 45 spaces a a arearranged at the outer ends of support d'1, as shown clearly in Fig. l. The

the arms of the scale-beam. Thus one of the slide d2 is provided with a set-screw g, wherescales reads from a space a inward toward by it is clamped securely on the sleeve d.

the space a on the same side ot the ulcrum, It will be seen that the long arm of the and the other scale reads Jfrom the space a auxiliary beam is in effect suspended from roo o on thepposite side of the fulcrum outward one end of the main beam, whereby a weight toward the space a.. or poise placed on the arm of the auxiliary beam (which is graduated, as shown, from the linl( outward) has a double or increased leverage on the main scaledaeam. The scale on the auxiliary beam reads from the link lf) outward, and a poise E is provided to regis- -ter with the graduations. This poise E may be single, as shown in Fig. l, or it may consist of two members c e, as shown in Fig. i. rlhe poise shown in liig. t is similar to the poises shown in connection with the main sealebeam in Fi l.

The auxiliary scale-beam E is capable of longitudinal movement or adjustment by means of a milled screw sleeve or nutji engaging a screw fx, which projects rearwardly from the sleeve d, said nut bearing through a disk f" formed thereon in a notch]l2 inv the beam E. The poise on the beam E also normally occupies a blank or ungradimted space at one end of the beam.

Freni the foregoing it will be seen that in order to balance the main scale-beam A the poises c c are all adjusted at their respective zeros, as shown in Fig. l, and the beam A, after loosening the screw l0, is slid or moved longitudinally in the sleeve A until balanced. rlhe weighing operation may now be conducted by moving the auxiliary weight poise e', standing at the left on one end ot the beam A, inward, or by movingI the auxiliary poise c', standing atthe rightot the fulcrum, outwardly, the direction of movement being indicated by the arrows.

The movable slide A2, carrying the weighing-pivots, provides :for the preliminary bal,- aneing ot' the weighing-poiscs, which is a matter the manufacturer' has wholly to do with. The manufacturer finds it necessary to equalize slight differences ordiserepancies in the weight ol' two or more sets of poises in order to produce an accurate scale. To do this the weighing-pivots are moved slightly to or from the fulcrum, as may be required, the poises then having a portion of their weight or bull; removed or their bulk increased until each balances the other, the weighing-pivots now being fixed at their non mal positions. lVhen loose weights are used, they are suspended or Iixed l'n'oportionatcly distant from the fulcrum-points established and governed by the standard.

In Fig. et shown the auxiliary scalesbeam E as applied for use separate from the main scale-beam A. This adjustment is accomplished by discngaging the link D from the pivots df, resting the pivots d on the fut erum supports h", (in the salue way that the main beam is tulcrumed in Fig. l,) and engaging' the hooks f1 ot the scale-platform with the pivots (Z3. li: will bc seen that this change consists merely in substituting the hooks ffor the standard d". (Shown in Fig. l.)

From the above it will be evident that while thc main scale-beam may be employed inde pendently of the auxiliary beam it is preferable to combine them, inasmuch as the weighing capacity of the scale is thereby increased,

but when small or light articles are to be weighed the scale-platterm is preitn'ablysuspended from the .fulcrom-pivots ot' the auxiliary beam and the weighing done on the latter.

It will be seen that the scaleplatform or load is suspended i'rom that arm ol.' the main scale-beam on which the graduatious increase toward the fulcrum or inward, and the auxiliary scale-beam is connected to the extremity ci' that arm oi the main beam on which the graduations increase l'rom the (ful.- crum or outward, as shown. The load in the improved scale is always suspended trom the imitinbeam, the auxiliary beam beim.,r merely employed to carry supplementary poises, whereby the leverage on the main beam is increased in order to increase the weighing ea pacity ot the scale.

Having thus fully described my invention, what I 'claim as new, and desire to secure by Letters Patent, is-

l. A scale-beam l'uicrumed at an intr-irmediate point and provided on each side olf its fulcrum with a series ol. graduations which increase, respectively, toward and l'rom the fulcruin, and also provided at each end of each series with a space devoid oi graduations to receive the poises, in combination with two sets of poises arranged, respectvely, on opposite sides of the :ifulcriunand adapted to occupy said uugraduated spaces, each set ot' poises consisting ot' two indepemlent members, substantially as and :for the purpose specified.

2. A longitudinally-adjustable scale-imno tulcrumed at an intermediate point, provideffl on each side of its tulcrum with a series oi' graduations which `increase in. the same direction, ies} ectively, toward and from the fulcrum, and also provided with a central space and end spaces which are devoid oi' graduations, substantially as speciled.

5:5. ln weighing-scales, the centrally-poised main beam, both arms of which are graduated and carry weighing-poises, in combination with an auxiliary beam, the ltmger arm. of which is connected ncarthe iifulcrum to the outer or tree end ot' one of the arms of. the 'main beam, substantially as specified.

et. In weighing-scales, the centrally-poised main beam, each arm oi which is provided with a series ot graduations which increase, respectively, toward and :from thc itulcrum, the load being suspended `trom the inner end oi that arm on which the grad nations increase toward the Fulci-um, and the weighingpoises arranged, respectively, on the arms ot' the beam and adapted to be normally located at the initial points ot' the series et' graduations, in combination with an auxiliary scalebeam carrying a poise on itslongergradllated arm, said arm being' cminectcd near its .finlcrum tothe extremity of that arm of then'lain beam on which the graduations increase outward or from the tulcrum, substantially as specified.

IUO

5. In Weighing-scales, the combination of the main centrallypoised beam having a movable pivot, and having both arms graduated, respectively, toward and from the saidA pivot, the movable Weighing-poises arranged, respectively, on opposite sides of the pivot, and the auxiliary beam provided with a movable pivot and a Weighing-poise, and having its longer arm connected to the extremity of one of the arms of the main beam, substantially as specied.

6. A scale-beam provided with a blank or ungraduated space and an auxiliary Weighin gpoise, in combination With the usual Weigh* ing-poise upon the same beam and adapted to register with the same series of graduations and the longitudinally-adjustable auxiliary beam, substantially as set forth.

7. In a Weighing-scale, the combination of the scale-beam having two series of graduations and having a blank or ungraduated space at each end of each series of graduations, and the-two sets of poises of two poises to each set, one set being adapted to register with each r`series of graduations, substantially as speciiied. y

8. In Weighing-scales, the combination ot a centrally-poised main scale-beam having both arms graduated, the two sets of double poises arranged, respectively, on the tWo arms of the scale-beam, and a movable sleeve fitting on said beam between the series of graduations and carrying the pivots for the scale-beam and the scale-platform rod, substantially as specified.

9. In Weighi ng-scales, the combi nation with a separate sleeve provided with pivots and a scale-beam extending through and supported in said sleeve, of the movable slide carrying` Weighing-pivots adjusted on the said sleeve, substantially as and for the purpose specified.'

l0. In weighing scales, the combination, with a double or centrally-fulcrumed main scale-beam carrying Weighing-poises and provided With a movable sleeve having the poising and Weighing pivots, of the auxiliary scalebeam iitting in a fulcrumed sleeve which is connected to one arm of the main scale-beam, said auxiliary beam being longitudinally adjustable in the said sleeve, substantially as specified.

ll. In Weighingscales, the combination, With the main centrally-poised scale-beam, of an auxiliary scale-beam provided with a fulcruined sleeve which is connected to the main scale beam and is provided with a threaded stem and a milled n ut fitting on said stem and provided With a Iiange which engages a notch in said auxiliary beam, whereby the latter may be longitudinally adj usted in the sleeve by turning the nut on the stem, substantially as and for the purpose' specified.

l2. In Weighing-scales, the combination,

with a scale-beam, of a loose sleeve fitting on the beam and provided with pivots and a slide fitting on the said sleeve and provided with pivots, substantially as speciiied.

VILLIAM II. STEVART. lVitnesses:

S. M. GARATT,

C. S. ELLIOTT. 

